Watch List notes:

Constantine I (306-337), Follis, Rome, AD 312-313; BI (g 3,48; mm 22; h 6); IMP CONSTANTINVS P F AVG, laureate and cuirassed bust r., Rv. S P Q R OPTIMO PRINCIPI, legionary eagle between two vexilla; in ex. RP. RIC 349a.
Traces of silvering, about extremely fine.